<form action="index.php" method="post">
    <input type="hidden" name="act" value="news">
    <input type="hidden" name="op" value="edit">
    <input type="hidden" name="news_id" value="<?php echo $_GET['news_id'];?>">
<table>
    <tr><td>
            新闻标题<input placeholder="新闻标题" type="text" name="news_title" value="<?php echo $row_news['news_title'];?>" required>
        </td></tr>
    <tr><td>内容：
            <textarea name="news_contents" ><?php echo $row_news['news_contents']?></textarea>
        </td></tr>

    <tr><td><input type="submit" name="submit_news_edit" value="编辑"></td></tr>
</table>
</form>
<script>

</script>